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- Compensated balance by John Gottlied
- Ulrich, London. Ulrich's principle was
- developed within five decades and often
- varied. Here is a later version in which
- the equalizing weights on the balance
- move farther away from the axis of the
- system at high temperatures but nearer
- at low temperatures. This theoretically
- correct idea is hard to put into practice,
- though, is not easy to adjust , and has
- proved to be not stable enough in
- practice.